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在ＣＯ２焊和Ａｒ＋ＣＯ２混合气体保护焊条件下，通过“铁研试验”、拉伸、冲击和金相试验等，对１５ＭｎＭｏＶＮＲｅ高强钢焊接接头区域的化学性能、显微组织及断口形态进行了试验研究，结果表明：采用“低强匹配”焊材（ＧＨＳ—５０焊丝）和严格控制焊接线能量（ｑ／ｖ）在２０ｋＪ／ｃｍ以下，可在不预热条件下焊接淬硬倾向较大的１５ＭｎＭｏＶＮＲｅ钢，并可保证焊接接头性能满足使用要求。该焊接工艺可大大提高焊接生产率、降低成本，具有重大的社会经济效益。
The chemical properties, microstructure and fracture morphology of 15MnMoVNRe high-strength steel welded joints were studied by means of “iron penetration test”, tensile test, impact test and metallographic test under the conditions of CO2 welding and Ar + CO2 mixed gas welding. The results show that 15MnMoVNRe with high hardenability can be welded under the condition of not preheating by using “low-strength matching” welding consumables (GHS-50 welding wire) and strictly controlling welding wire energy (q / v) under 20kJ / Steel, and can guarantee the performance of welded joints to meet the requirements. The welding process can greatly improve the welding productivity, reduce costs, with significant social and economic benefits.